WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in MIRM — Mirum Pharmaceuticals, Inc.

CIK 1644956 CHICAGO, IL

Position in MIRM

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$31,009,102

+$4,413,091 QoQ

Shares Held

335,669

-0.3% QoQ

Ownership

0.550%

of shares outstanding

% of Portfolio

0.10%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2023

8 quarters on record

Voting authority Sole 75.86253124357626.ToString("F0")% Shared 0.ToString("F0")% None 24.13746875642374.ToString("F0")%

Healthcare · as of Mar 31, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $1,135,241,101 across 13 Biotechnology names. MIRM ranks #9 (2.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ARGX	Argenx SE	266,067	$194,295,426
2	MDGL	Madrigal Pharmaceuticals, Inc.	340,519	$178,251,480
3	HALO	Halozyme Therapeutics, Inc.	2,525,975	$163,253,764
4	INSM	INSMED Inc	902,666	$147,603,944
5	TECH	BIO-TECHNE Corp	2,462,487	$128,689,570
6	KRYS	Krystal Biotech, Inc.	407,178	$105,182,220
7	CYTK	Cytokinetics Inc	1,087,591	$71,683,122
8	VCEL	Vericel Corp	1,832,709	$58,958,248

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$31,009,102	335,669	-0.3%	Shares	Sole	2026-05-08
2025-12-31	$26,596,011	336,701	+7.5%	Shares	Sole	2026-02-09
2025-09-30	$22,965,017	313,259	-53.8%	Shares	Sole	2025-11-12
2024-06-30	$23,178,734	677,939	+8.1%	Shares	Sole	2024-08-08
2024-03-31	$15,757,072	627,272	+0.9%	Shares	Sole	2024-05-08
2023-12-31	$18,354,886	621,778	+16.5%	Shares	Sole	2024-02-09
2023-09-30	$16,864,698	533,693	+58.2%	Shares	Sole	2023-11-09
2023-06-30	$8,728,900	337,414	—	Shares	Sole	2023-08-11
No filing history on record for this holder in this stock.